marsh



4 Sheets-.-Sheet 1.

J. MVMARSH. PRINTING PRESS;

No. 5,819. Patented Oct. 3, 1-848.

' 4 sheets-sheet 2.

J. M. MARSH.

PRINTING PRESS.

No. 5,819. Patented Oct. 3, 1848.

lll'ill lllllillllllilill 4 Sheets-Sheet 3.

J.M.MARSH. PRINTING PRESS. Patented O-t. s, 1848.

4 Sheets Sheet 4.

RSH.

PRESS.

J. M. MA PRINTING No. 5,819. Patented Oct. 3, 1848. v

Jos. MARSH, on NEW YORK, N. Y.

PRINTING-PRESS.

Specification of Letters Patent No. 5,819, dated October 3, 1848.

Too whom it may concern:

Be it known that I, J osnrn- M. MARSH, of the city, county, andState of New York, have inventednew andnseful Improvements inGylinder Printing-Presses, and that the following is a full, clear, and exact description of the principle or character which distinguishes them from all other things before known and of the manner of making, constructing, and using the same, reference being had to the accompanying drawings, making part of this specification, in which Figure 1 is a plan of my improvedprinting press; Fig. 2, a. rear elevation; Fig. 3, a longitudinal vertical section taken at the line (w w) of Fig. 2; Fig.- 4, a separate View of the rack and cog wheels for operating the bed of the press; Fig.- 5, a separate view of one of the segmental supporters; Fig, 6, an

elevationon an enlarged scale of the trip lever and one of the sliding boxes in which the journals of the inkingrollers run; and Fig. 7 an enlarged view of the spring arms for operating the grippers. v

c The same letters indicate like parts in all thefigures. c

The first part of my invention relates to the method of giving the required recipro eating motion to the carriage or bed of the press, and consists in effecting this end by means of two cogged wheels and a cogged rack, each wheel being composed-of two segments of difierent diameters and so placed relatively to each other and the rack that the small segment of one-engages the large segment of the other and, vice versa, and so that when the cogs of the large'segment of the first wheel is carrying the rack in one direction the cogs of the small segment engage the cogs of the large segment of the second, and just as the end of the cogs of the large segment of the first wheel are leaving the rack the cogs of the large segment of the second wheel are just beginning to engage the cogs of the rack to carry itback in the opposite direction; in this way the use of additional cog wheels on the shafts of the segment wheels to present the segments alternately to the rack is entirely avoided.

The second part of myinvention, when.

used in combination with the first part, consists in making the tips of the cogs of the rack along a curved line so that the cogs along theportions operated upon by each segment shall be in full gear at the middle and gradually less toward each end that the cogs of one segment may disengage at each end asthe cogs of the other segment are beginning to engage, and vice versa'the rack being provided with a long cog at each end-to insure the motion of the rack when started ateac'h end. The third part of my invention consists musing one, two, or more circular segmental bearers on a shaft below the carriage anclin combination therewithto sustain the bedof the press while passing under the pressure of the cylinder.

The fourth part of my invention consists in-combining with sliding boxes in which the journals of the inking rollers run, What I denominate trip levers, that is, levers which lie below the sliding boxes, that part of the said levers which is below the sliding fingers are closed and opened by pins against i which. they strikeas' the cylinder rotates, the

spring arms being introducedthat they may 1 yield whenever it maybe desired to turn back the cylinder, andthus avoid breakage.

In the accompanying drawings (a) repre-, I

serits a" frame, adapted to the purpose but which may be'variedat pleasure, and (b') the bed, or carriagewhich receives the formof types 'andwhich; runs on ways (c,- c) ;in'

manner similar to the well known cylinder press. Y

' sionis constructed and arranged in the usual manner, and receives a continuous rotary movement from amain shaft (a) by a train of cog wheels (f, ,h); v j, v

On the shaft (.z') of the Wheel (9) and aboutthe middle of its length, there is a cog wheel made of two segments,;the

diameter of one segment being greater than the other by about the depths of the cogs: n

The cogs of each segment occupy nearly one half of the entirecircumferenee, there being a space on eachside at the junction of the two segments equal each to a cog, and the length of these segments, the difference in their diameter, and the size of the cogs should be such that the large segment shall have one more than the small one.

Immediately in front of the cog wheel just described and on a parallel shaft (is) there is another cog wheel composed of two segments (1, Z) similar in every particular to the one described, and so located with reference to the proportions indicated that the cogs of the large segment of the one shall engage the cogs of the small segment of the other, and vice versa, so that the one shall rotate the other in the opposite direction, as in the case of ordinary cog wheels. To the under face of the bed or carriage there is properly secured an inverted cogged rack (m) that is alternately engaged by the cogs of the large segments (j) and (l) for the purpose of giving the required reciprocating motion to the carriage, the segment (i) being employed to run it in, and the one (Z) to run it out; but as the rack is much longer than the periphery of either one of the segments, to prevent their cogs from catching, or rather hanging, in the cogs of the rack, these are so formed as to have the general line of their tips curved in the following manner: supposing the length of the rack to be divided in two parts by the red line (n, n) the cogs in the middle of each of these divisions are made of full depth, and from these points toward each end the cogs are made of gradually less depth so that the cogs of the segments shall become gradually disengaged and engaged.

At each end of the rack there is a cog (0, of full depth for the purpose of starting the rack. As the segment (j) rotates in the direction of its arrow it carries the rack and carriage in the direction of the arrow (p), and during this motion the segment (2,) is moving in. the reverse direction, as indicated by its arrow, and as it passes the rack it will be obvious that'if thecogs thereof were of full length (on a plane parallel with the line of motion) that they would catch and that some part of the machinery would of necessity break, but as the cogs are of less length at the part then being passed the cogs of the segment andrack do not come in conflict, and the segment (Z) passes around freely until the first cog thereof strikes against the long cog (0) and by that time the cogs of the segment (j) have become disengaged from the rack, partly by the distance to which they have been rotated and partly by the reduced depth ofthe cogs of the rack along the middle of its length, and therefore the segment (Z) starts the rack in the direction of the arrow (32') and by reason of the long cog (0) the segment (I) carries the rack sufficiently far to enable the reversed motion it will be obviousthat the same thing will take place at the other end. In this way the required reciprocating motions are given to the rack from the continuous motions of the segment wheels without shock or jar and without breaking the cogs.

There are two ways g) attached to, or formed on the under face of the bed or carriage, the under faces of which correspond with the pitch line of the rack (m), and on the shaft (71), which lies vertically below the cylinder (d) of the press, there are two cylindrical segmental bearers (r, r), (represented by red lines in Fig. 3), the peripheries of which correspond with the pitch line of the large segment (j), so that as the shaft with the cylindrlcal segmental bearers rotates the ways (g, will run on the periphery of the bearers to sustain the bed or carriage and resist the pressure made on the form of types by the cylinder in giving the impression, and thus not only avoid the yielding of the bed, but at the same time save much of the friction which would be produced did the carriage, as in the usual manner, run on flat rails or ways. I The inking rollers (s s) that spread the ink on the form'of types have their bearings in sliding boxes (6, t) on each side, that slide vertically on stud pins projecting from the inner face of the frame, and these rest each on a cam formed trip lever (14), which when in the position represented in Fig. 6-

holds the sliding boxes up so high that the periphery of the rollers will receive ink from the inking cylinder, and when turned in the position represented by dotted lines in Fig. 3 permits the boxes to slide down so low that the rollers run onand ink the form of types.

For the purpose of tripping the cam formed levers theyare each made with two arms (4), o) and the carriage is provided with a pin (10) on each side, which, as the carriage runs out strikes'the arms ('21) to trip the lever (to) and permit the rollers to descend and run on the form of types, and as it runs in strikes the arms ('0') to elevate the rollers.

becomes necessary for any purpose to re verse the motion of the cylinder the opposite side of the arms strike against the pins, and as the arbor cannot turn in the reverse direct-ion the arms contractthe spring (0) and turn on the joint which connects them with the nut on the end of the arbor and thus permits the cylinder to turn without breaking or injuring the fingers in any particular.

It will be obvious from theforegoing that some parts of my invention can be employed without others, and that my improved method of giving the reciprocating motion to the carriage can be advantageously applied to other purposes. It will be obvious also that instead of reducing the depth of the cogs on the rack alone for the purpose of clearing, that this maybe divided by part-1y reducing the depth of some of the cogs of the large segments. If it be desired to locate the rack and segment Wheels .in other parts, the cylindrical segmental bearers can be put on a separate shaftto efiect the same purpose.

What I claim as myinvention and desire to secure by Letters Patent is 1. The method, substantially as herein described, of obtaining a reciprocating motion from a continuous rotary motion, by combining with a cogged rack two cog ed Wheels composed each of segments of diti iarent diameters, the small segment of one Wheel engaging the cogs of the large segbined segmental cog wheels made and running together. substantially as herein dey scribed, making the cogs of the rack of graduallyless depth toward-the ends and toward the middle of its length, and with a long cog ateach end, substantially in the manner and for the purpose specified.

3. I also claim the methodof sustaining the bedof the press as it reciprocates against the pressure'of the cylinder by combining with the bed one or more ways and rolling segmental bearers, substantially as described.

4. I also claim the method, substantially as herein described, of elevating and depressing the inking rollers as the bed of the press runs in and out, by combining with the rollers the sliding boxes and the trip levers, operated by the reciprocating carriage, as described. j

5. And finally I claim operating the finger bar by means of spring jointed arms at the end thereof, substantially as described, to admit of turning back the cylinderavithout injury to the arms, finger bar or fingers, as described.

J. M. MARSH.

Witnesses:

ALEXR. PORTER BOURNE, E. PETERS. 

